<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <form action="">
            <div>
                用户名：<input type="text" v-on:keyup.delete='clearContent' v-model='uname'>
            </div>
            <div>
                密码：<input type="text" v-on:keyup.enter='handleSubmit' v-model='pwd'>
            </div>
            <div>
                <input type="button" v-on:click='handleSubmit' value="提交">
            </div>
        </form>
    </div>
    <script type="text/javascript" src="../js/vue.js"></script>
    <script type="text/javascript">
        var m = new Vue({
            el: '#app',
            data: {
                uname: '',
                pwd: ''
            },
            methods: {
                clearContent: function() {
                    // 按delete键的时候，清空用户名
                    this.uname = ''
                },
                handleSubmit: function() {
                    console.log(this.uname, this.pwd);
                }
            }
        })
    </script>
</body>

</html>